Mode of reducing the ends of pipes



(No Model.)

B. O. DANIELS.

MODE 0F REDUCING THE ENDS 0F PIPES. No. 375,050. Patented Dec. 20, 1887.

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UNITED STATES PATENT OFFICE.

EUGENE ORA DANIELS, OF SPRINGFIELD, OHIO.

MODE OF REDUCING THE ENDS OF PIPES.

SPECIFICATIQN forming part of Letters Patent No. 375,050, dated December 20, 1887.

(No mothl.)

To all whom it may concern:

Be it known that I, EUGENE ORA DANIELS, a citizen of the United States, residing at Springfield, in the county of Clark and State of Ohio, have invented certain new and useful Improvements in the Mode of Reducing Pipes, of which the following is a specification, reference being had therein to the accompanying drawings.

This invention relates to the art of compressing or reducing the size of metal pipes or tubes so as to form atenon or male projection on them adapted to enter the end of a contiguous section of piping or tubing; and it consists of the mode of so reducing pipes or tubes-namely, in placing the pipe or tube between two dies capable ofbeing brought into intimate contact with the same to reduce at least a portion of it to a form agreeing with the shape constituted by the two inner faces of the dies, conjointly considered, said shape being of tapering form, and in drawing said pipe or tube away from and through or between said diesin the direction of the contracted portion after the same has been sufficientl y engaged by the pipe or tube.

The invention also consists in first forming a more or less abrupt shoulder around the pipe or tube by compressing a portion thereof to agree substantially with the tapering contour of the dies,and then in treating the pipe or tube in the mode above set forth.

The form of apparatus which I prefer to use in carrying out my said mode for contracting pipes is that shown and described in Letters Patent granted to me June 21,1887 ,No. 365,053, together with such changes in the form of the dies as I will presently describe.

In the accompanying drawings, forming a part of this specification, and on which like reference-letters indicate corresponding features, Figure 1 is a vertical sectional view of the tool generally, showing the dies mounted therein; Fig. 2, a side elevation of the tool; Fig. 3, a plan view of one of the dies; Fig. 4, a vertical sectionalview of the dies and a pipe in them and about to be compressed; Fig. 5, a like view showing a pipe in the dies which has not been previously treated; Fig. 6, a View of the finished product.

The letter A designates a metallic box-like frameprovided with a cross-head, B, and front and rear plates. A follower, O, is mounted in the cross'head in the manner and for the purpose set forth in my said patent, and is supplied with a shell-like portion, D, exteriorly and interiorly screw-threaded, and in opposite directions, while E refers to the sliding box fitted to work up and down within the frame, and having a screw-threaded opening at one end, into which extends the follower, for the purpose of reciprocating the box. The frame may also have a mandrel, F, though this is not essential, all these several features being by preference substantiallylike the corresponding features shown' and described in my said patent.

Fitted within the box E is a die, G, made of steel and tempered hard, and above it and slidingly mounted in the box is a die, H, of like material and temper, and provided with a screw-threaded stem, I, suitably secured to it, and whose threads run oppositely to those on the follower. The threads in the follower receive the stem I, and thus by revolving the follower, as by a wrench, the box and the lower or fixed die, G, are moved in, one direction and the sliding (lie H in the other, so as to meet or recede from each other, as also set out in my patent already alluded to. These dies are hollowed out on opposite faces to form grooves or seats, which are divided into parallel and tapering portions J and K, the former being of approximately the same size as the pipe to be compressed or reduced before this opera tion takes place, and the latter tapering from about this size to the size to which it is desired to reduce the ends of the pipes or tubes.

As seen in Figs. 4 and 5, the dies have a pipe end extended into them, and the operation of compression or reduction of the end is ready to follow. In the former figure the pipe has been previously depressed for a short distance, for the purpose of rendering the subse quent operations easier, this reduction being accomplished in any desired manner-as by a milling-wheel in a lathe -while in the latter figure the pipe is not so previously treated.

There are two ways of operating the tool and of manipulating the pipe. One way is by simply projecting the pipe or tubeinto the tool, then operating the follower and forcibly drawing the dies toward each other, and when their faces have met or have nearly met some suitable appliance is applied to draw upon the pipe or tube and pull it from the tool and through the dies, thereby reducing the pipe to the size of the contracted neck existing where the tapering portions meet. The other way consists in mounting the tool in alathe-turret and in passing the pipe through a hollow lathe-mandrel and securing it in the usual chuck. Then, after the follower has been operated and the dies brought into the relative position above described, the turret is operated to move from the head-stock, carrying the tool with it and reducing the pipe as it does so. 7

Having thus fully described my invention, what I claim as new, and desire 'to secure by Letters Patent, is-

In the art of reducing pipes or tubes, the herein described mode, consisting, first, of bringing two dies having seats a portion of which is tapered so as to form a contracted mouth or channel forcibly against the exterior of the pipe or tube to reduce a portion of it into uniformity with the tapering portions of the dies, and, secondly, of forcibly moving the pipe or tube longitudinally away from the dies, or vice versa, so as to reduce the pipe or tube in diameter to the size of the said contracted mouth formed by the dies.

In testimony whereof I affix my signature in presence of two witnesses.

EUGENE ORA DANIELS.

Witnesses:

WILBER CoLvIN, EDWIN L. BRADFORD. 

